#include "BooleanOperationImplicitFunctions.h"
#include <vtkActor.h>
#include <vtkBox.h>
#include <vtkCamera.h>
#include <vtkColor.h>
#include <vtkContourFilter.h>
#include <vtkImplicitBoolean.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkSampleFunction.h>
#include <vtkSphere.h>

BooleanOperationImplicitFunctions::BooleanOperationImplicitFunctions(QWidget* parent)
	: QMainWindow(parent)
{
	vtkWidget = new QVTKOpenGLNativeWidget(this);
	this->resize(600, 400);
	this->setCentralWidget(vtkWidget);

	// Define colors
	vtkNew<vtkNamedColors> colors;
	vtkColor3d actorColor = colors->GetColor3d("AliceBlue");
	vtkColor3d EdgeColour = colors->GetColor3d("SteelBlue");
	vtkColor3d BackgroundColour = colors->GetColor3d("Silver");

	// create a sphere
	vtkNew<vtkSphere> sphere;
	sphere->SetCenter(1.0, 0.0, 0.0);
	sphere->SetRadius(2);

	// create a box
	vtkNew<vtkBox> box;
	box->SetBounds(-1, 1, -1, 1, -1, 1);

	// combine the two implicit functions
	vtkNew<vtkImplicitBoolean> boolean;
	boolean->SetOperationTypeToDifference();
	// boolean->SetOperationTypeToUnion()
	// boolean->SetOperationTypeToIntersection()
	boolean->AddFunction(box);
	boolean->AddFunction(sphere);
	// The sample function generates a distance function from the implicit
	// function.This is then contoured to get a polygonal surface.
	vtkNew<vtkSampleFunction> sample;
	sample->SetImplicitFunction(boolean);
	sample->SetModelBounds(-1, 2, -1, 1, -1, 1);
	sample->SetSampleDimensions(40, 40, 40);
	sample->ComputeNormalsOff();

	// contour
	vtkNew<vtkContourFilter> surface;
	surface->SetInputConnection(sample->GetOutputPort());
	surface->SetValue(0, 0.0);

	// Create a mapper and an actor
	vtkNew<vtkPolyDataMapper> mapper;
	mapper->SetInputConnection(surface->GetOutputPort());
	mapper->ScalarVisibilityOff();
	vtkNew<vtkActor> actor;
	actor->SetMapper(mapper);
	actor->GetProperty()->EdgeVisibilityOn();
	actor->GetProperty()->SetColor(actorColor.GetData());
	actor->GetProperty()->SetEdgeColor(EdgeColour.GetData());

	// A renderer and render window
	vtkNew<vtkRenderer> renderer;
	renderer->SetBackground(BackgroundColour.GetData());

	vtkWidget->renderWindow()->AddRenderer(renderer);


	// add the actor
	renderer->AddActor(actor);

	// Start
	renderer->GetActiveCamera()->SetPosition(5.0, -4.0, 1.6);
	renderer->GetActiveCamera()->SetViewUp(0.1, 0.5, 0.9);
	renderer->GetActiveCamera()->SetDistance(6.7);
}
